Traveler



Dec. 5, 1933.

P. C. WENTWORTH TRAVELER Filed Nov. 18, 1951 nya f/ havent-vr itflzilg'namnzwafzh a f l l r Z l By lonngy Patented Dec. 5, 1933 TRAVELERPhilip c. Wentwortmrfovidence, n.1.

Application November 18, 1931 Serial N0. 575,812

2` claims. (c1. 11s-#61) Myx present invention relates to travelers andtheir manufacture. Such travelers may be for various purposes, but as abasis of illustration and discussion I will refer more particularly tothe twister traveler. This type of traveler has been required to meetunusual demands of accuracy and uniformity. For example, in the twistingof tire cords it is of the utmost importance thatfriction be maintainedat as close to absolute uniformity as possible.

In travelers generally there has been previously recognized a need ofavoiding the fraying of :the yarn, thread or cord, as it runs under thetraveler. My previous Patent No. 1,415,071 dealt with one phase of thisproblem and I found the general theory correct. In fact, the principleinvolved carries further concepts which are important in themselves andin combination with other factors, as will hereinafter appear;

As a simple illustrative basis of reference for discussing my invention,I have shown in the accompanying drawing a twister traveler.

Fig.` l shows a side view of the traveler on an indicated section ofring.

Fig. 2 a face view of the traveler looking be tween its ends and towardsthe ring contacting ,surface of its back.

Fig 3 is a rear view of the traveler.

jFig. 4 is a section on the line 3--3, Fig. 1.

. Fig. 5 is a section on the line 4 4, of Fig. 1, and

Fig. 6 is a section on the line 5 5, Fig. 1.

The traveler comprises the usual top flange 1, bottom foot 2 and back 3.As shown in Fig. 1, itis indicated as sprung into position on a ring R.The cord C runs under the upward arch between the top flange and theback and it is highly desirable that over this area the traveler presenta rounded cross section which will not scrape the cord` but permit it torun free.

In producing travelers commercially in large quantities and greatvarieties of sizes and styles, it is of the utmost necessitythat themanufacturing methodtprovide for quantity production and economy whileat the same time producing the high degree of accuracy demanded for alltravelers.

Myinvention contemplates the utilization of a slightly half roundedstock or of rolling such stock from ordinary wire so as to get thedeisired cross section. It may be herenoted `that the matter of rolling,bending and forming of such travelers involves a still further factorwhich has heretofore given rise to many difficulties.

For such travelers I preferably use a bronzeV .alloy including phosphor.bronze and so-called American bronze.` Initially these materials arerelatively soft, but according to my invention I bring them to thedesired hardness while rolling to the cross section indicated. Travelersso V formed and of such cross section gave no trouble in any fraying ofthe cord or thread, but another and more serious diiiiculty wasencountered. In forming the inner face of the traveler with a curved orrounded or partly cylindrical surface e5 and with the materials used,there was a tendency to wear on the inner face of the traveler along itsback where it contacted with the ring. 'Ihat is to say, as the travelerran it eventually developed a flattening of its curvature or convexityalong that line or plane of contact. This `increased as the wearcontinued and it was found that such conditions introduced a varation infriction that was unfavorable to uniformity and accuracy of the twist.

According to my concept of such structure the amount or area of such acontact surface while of course it should be relatively small, does nott malte much difference. The important proposition is that of uniformityand that such surface, does not wear away or wears only very, veryslowly. Then the difficulties are correspondingly decreased.

My invention therefore contemplates the formation of a slightlyflattened and hardenedcontact surface along the inside of the back wherethe traveler frictions the ring. The difculty of forming such a surfacewould seem to be great, but as my concept has developed I have found itpossible to make manufacturingg() assets out of what would have beenliabilities. It is desirable that the traveler be formed while still ofuniform cross section, but after the travelers are formed it is, ofcourse, diicult to rework the inner face of the traveler. In thisconnection my partly rounded flat back' stock and the use of a materialsuch as an alloy which will harden under rolling provides the solution.I form preferably by an impacting hammer or die on the inner surface ofthe back...100 a slight flattening 31 which at the Sametime gives anextra hardening to this surface. I find that the Rockwell hardnesstester indicates that this surface is about twenty-two points harderthan the rest of the surface of the traveler. Here .105 again theproblem of the originally soft stockA and the originally rounded innersurface of the back and the new factors of flattening and hardening byimpact have overcome the difficulties. "110 my invention economicallyand are applied toY the ring and otherwise operated accordingv tostandard practices in ring twisting or spinning.

What I therefore claim and desire to secure by Letters Patent is:

1. A ring twisting traveler adapted to be run in a vertical positionabout a twisting ring consisting of a member formed to present a topflange, a bottom foot and a back connecting said '-flange and foot, saidtop flange and said foot both having areas of inwardly rounding crosssection which oier minimum friction to the yarn and to the lower edge ofthe ring respectively, and said back having a flattened areaintermediate of said rounded areas which oers a substantially uniformfriction as distinguished from a varying friction to the generallycorrespondingly flattened back face of the ring in the run of thetraveler on the ring.

2. A ring twisting traveler adapted to be run in a vertical positionabout a twisting ring, consisting of a member having a top ange ofinwardly rounding cross section, a bearing foot,

and a back connecting said flange and foot, said ange and foot ofsubstantially equal hardness, and said back having a attened area ofgreater hardness than the ange and foot and offering a substantiallyuniform friction to the generally correspondingly flattened back face ofthe twisting ring in the run of the traveler on the Ilng.

' PHILIP C. WENTWORTH.

